强流二极管阳极靶温度和热形变模拟  

Simulation of the temperature and thermal deformation of anode targets in high-current diodes

作　　者：胡杨[1] 蔡丹 孙江[1] 张金海 杨海亮[1] 孙剑锋[1] 尹佳辉[1] 呼义翔[1] Hu Yang;Cai Dan;Sun Jiang;Zhang Jinhai;Yang Hailiang;Sun Jianfeng;Yin Jiahui;Hu Yixiang(Northwest Institute of Nuclear Technology,State Key Laboratory of Intense Pulsed Radiation Simulation and Effect,Xi’an 710024,China)

机构地区：[1]西北核技术研究所,强脉冲辐射环境模拟与效应国家重点实验室,西安710024

出　　处：《强激光与粒子束》2022年第7期99-105,共7页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(11705150)。

摘　　要：以电子束在靶中的能量沉积剖面为桥梁,建立了二极管阳极靶温度和热形变模拟方法。该方法可获知二极管不同工作状态下靶的温度分布和热形变情况,为靶热-力学损伤研究提供基础数据,为二极管构型设计和寿命提升提供技术支撑。将该方法应用于“强光一号”短γ二极管,计算结果显示:当阳极离子密度大于10^(14) cm^(−3)时(强箍缩),靶表面温度最高可达5500~6000℃,热形变量达约4.5 mm;无离子流时(弱箍缩),温度处在4500℃左右,形变为2.8~3.5 mm。The thermal-mechanical damage induced by high current pulsed electron beam striking on anode targets is a key factor affecting the stability and lifetime of high current diodes.This problem is mostly addressed by replacing the anode target and cleaning the cavity and cathode to ensure the normal operation of the diode.In this paper,a diode anode target temperature and thermal deformation simulation method is established using the energy deposition profile of the electron beam in the target as a bridge.The method can be used to determine the temperature distribution and thermal deformation of the target under various diode operating conditions,provide basic data for the investigation of thermal-mechanical damage to the target,and provide technical support for diode configuration design and life enhancement.With application of this method to the“Qiangguang-I”accelerator,the simulation results show that the surface temperature of the target can reach 5500−6000℃and the thermal deformation can reach about 4.5 mm when the ion density is more than 10^(14) cm^(−3) (tight-pinched).The temperature is about 4500℃and the thermal deformation is 2.8−3.2 mm when there is no ion flow(weak-pinched).

关 键 词：强流二极管 阳极靶 温度 热形变 模拟 

分 类 号：TL506[核科学技术—核技术及应用] O462[理学—电子物理学]